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1Back to top Go down   Show me your MAF elbows and cone filters! Empty Show me your MAF elbows and cone filters! on Tue Jan 23, 2018 12:41 pm

boostd4

boostd4
Silver member
Silver member
Looking to clear out some space above the engine to relocate my battery. I've seen several 2V k's with the airbox removed, and a metal tube elbow like this:

Show me your MAF elbows and cone filters! Monza-fuel-filler-cap-for-bmw-k100-k75-k1100
Was curious how people have mounted the MAF for stability when using one of these and a cone filter.  Does changing the MAF orientation change it's operation?  Basically, is the flapper door affected by gravity if it's mounted a certain way?

    

boostd4

boostd4
Silver member
Silver member
bump!

No one?

    

jmccrary

jmccrary
Silver member
Silver member
I would love to see some.  Especially if you made them!

    

charlie99

charlie99
VIP
VIP
i think if you keep the maf on axis   , ie flat with connector block on top , the operation should be ok

just a matter of building some form of stable bracket to hold it in place (there will be more torque applied with the tube and filter in place ) so something substantial is my best guess


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OShow me your MAF elbows and cone filters! Au-log10

"redframe" rs "bitsa"  with many contributions from the k100 community ,,with many thanks
    

chris846

chris846
Life time member
Life time member
As Charlie says - my experience with the flapper valve is that it doesn't work properly unless it's horizontal. That said, I have seen some pictures of custom bikes with it rotated 90 degrees - but you never know if these things actually run!
I trimmed the rubber connecting elbow on mine so's the unit pointed more out to the side.i'll post some pictures later. It's a simple enough job To make a bracket to support the unit. Search eBay for 'jetronic filter' and you should find an adaptor for a cone filter.


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The Longest Lunch
    

jbt

jbt
Silver member
Silver member
@chris846 wrote: but you never know if these things actually run!
That's the point...
Internet is full of photos, but you don't ride a photo...

    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I suspect that a lot of the cafe conversions are industrial sculpture and that the builders are artists vs. riders.  If they are even used at all, it's just to get them to a graffiti covered brick or concrete wall for photos.


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Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

RicK G

RicK G
VIP
VIP
Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271Show me your MAF elbows and cone filters! 44271


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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
What are we gunna do, place four separate MAFs to the ends of four elbows? On an 8V we need a common intake manifold with which the individual elbows connect to the one MAF.

One option, though it will require a bit of fiddling in a different direction, is to obtain a Motronic unit, the appropriate separate engine wiring loom, and convert yer 8V. Everything plugs in and works and if you scour eBay and other second hand spares sites you can gather the requisite bits for not too much dosh.

This IS a 16V, but a close-up or two shows a way to change what the factory done did. This was my attempt at removing the airbox, whilst hopefully improving bottom end torque (through a substantially longer intake path between TB plate and intake valve), and giving it a bit more of a see-through 'look'. No graffiti posing required. She's a rider.
Show me your MAF elbows and cone filters! 20180315
Show me your MAF elbows and cone filters! 20180316


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1987 K100RS, '89 K100 w/K1100RS engine, '93 Framed K11/K12 engine 'Big Block', '96 K1100RS, '09 K1300GT, '13 R1200RT-P, '95 R100 Mystic & '77 R75/7.

    

robmack

robmack
Life time member
Life time member
If you go so far as to adapt a Motronic, wouldn't it be just a small step to adapt a modern digital FI system like Megasquirt? That way you'd get the ability to digitally interface to the brains and tune everything about the engine, plus have access to the deep understanding of what's going on. Bosch is very secretive about how Motronic works.


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Robert
1987 K75 @k75retro.blogspot.ca
http://k75retro.blogspot.ca/
    

K75cster

K75cster
Life time member
Life time member
If you look at how the Zorst pipes are formed in equal length to perform, then you might consider doing that with the inlets and pipe around to the flap and filter and put them on or infront of the engine. Putting the battery behind the radiator would be doubly hot with engine and radiator doing their thing. Using two radiators would resolve that and allow the filter flap and batt to be placed in optimal places. All the trail bikes of today use two radiators surely one or two would offer a solution for you.

If you have ever stuck your hand on a carby that is on a four or six cylinder engine you'd know they have plenty of suck. Even something as small as our 1 litre engines have plenty of suck. The flap is spring loaded also to a minor degree so ?? one would be inclined to try it in either position.

If you have the where with all to start it then you have what it takes to change it.



Last edited by K75cster on Mon Mar 26, 2018 4:02 am; edited 1 time in total (Reason for editing : read it go it wrong)


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Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

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